/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.graphics;

import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.view.View;

public class DrawPoints extends GraphicsActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {
		private Paint mPaint = new Paint();
		private float[] mPts;

		private static final float SIZE = 300;
		private static final int SEGS = 32;
		private static final int X = 0;
		private static final int Y = 1;

		private void buildPoints() {
			final int ptCount = (SEGS + 1) * 2;
			mPts = new float[ptCount * 2];

			float value = 0;
			final float delta = SIZE / SEGS;
			for (int i = 0; i <= SEGS; i++) {
				mPts[i * 4 + X] = SIZE - value;
				mPts[i * 4 + Y] = 0;
				mPts[i * 4 + X + 2] = 0;
				mPts[i * 4 + Y + 2] = value;
				value += delta;
			}
		}

		public SampleView(Context context) {
			super(context);

			buildPoints();
		}

		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = mPaint;

			canvas.translate(10, 10);

			canvas.drawColor(Color.WHITE);

			paint.setColor(Color.RED);
			paint.setStrokeWidth(0);
			canvas.drawLines(mPts, paint);

			paint.setColor(Color.BLUE);
			paint.setStrokeWidth(3);
			canvas.drawPoints(mPts, paint);
		}
	}
}
